Clock of "The Metronome" at Union Square
From the official Union Square website:

How to read the clock – the Metronome -- on the art wall at 1 Union Square South? The 15 numbers of the digital clock display time going and coming relative to midnight. Read time going left to right and time coming in the opposite direction. So, if the clock reads 070437000235616 it means that it is 7:04 A.M. (7 hours and 04 minutes since midnight) and that there are 16 hours, 56 minutes and 23 seconds remaining until midnight. The three numbers in between are a blur of moving numbers.

Search light catching a Helicopter, Brooklyn Bridge
Lots of flood lights around Brooklyn Bridge, supposed to be a movie shooting for "I'm a Legend" starring Will Smith. Rumors are there is a scene with hundreds of zombies, army, helicopters and evacuation to be shot near South Street Seaport somewhere this week.

Earthshine over Manhattan
Wikipedia: The phenomenon known as planetshine occurs when reflected sunlight from a planet illuminates the dark side of one of its moons. Typically, this results in the moon's dark side being bathed in a soft, faint light. The best known example of planetshine is Earthshine, which can be seen from Earth when the Moon is a thin crescent.